By means of opposite movement between movable and fixed fluted disc,materials are bumped and rubbed by the slopping toothed edges.With the friction of themselves,the materials are crushed.20B/30B/40B pulveriaers made of stainless steel are all designed according to GMP standard.The water cooling jacket is equipped for the crushing rooms of 30B and 40B pulveriaers.This machine is the most ideal crushing equpment with simple structure.,high production output and easy to clean.